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Free Download GB/T 19472.1-2019 Buried Polyethylene PE Structural Wall Pipeline

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Construction Control of Trenchless Directional Drilling for PE Drainage Pipe

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Welding and Laying of PE Pipe in AD

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National standard for rigid polyvinyl chloride (PVC-U) pipes for building draina

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Code for pipe structure design of water supply and drainage engineering GB50332-

GB50332-2002 Code for the design of pipeline structures for water supply and drainage projects, approved and issued by t...

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